2.2c mastication

Question 1

2 joints for mastication

Answer 1

temporomandibular joint (TMJ)

mandibular symphysis

Question 2

jaw opening muscle

Answer 2

digastricus

Question 3

jaw closing

Answer 3

temporal
masseter
lateral and medial pterygoid

Question 4

what is temporomandibular joint for

Answer 4

• Upper component allow rotation
  ○ For opening and closing the mouth
• Lower component allow translation of the jaw
  For side to side motion and forward, backward motion

Question 5

what is the mandibular symphysis for and what animals is it found in

Answer 5

• Only found in dogs and ruminants
• Allow fine compensatory adjustment
• precise occlusion
• Independent rotation of each mandibular bone - move apart

Question 6

the 3 compartment of nose

Answer 6

• external nose
• nasal cavities
• paranasal sinuses

Question 7

what is the nasolacrimal duct for

Answer 7

It carries tears and allow draining from eyes to nose

Question 8

what is the nose covered by

Answer 8

mucosa

Question 9

characteristics of the external nose

Answer 9

flexible and cartilaginous

Question 10

features of the nasal cavity

Answer 10

• Twinned pair of cavities
• Nasal cavities contain bones covered by mucosa
• Features of neighboring anatomy reduce their size

Question 11

Features of neighboring anatomy reduce the size of the nasal cavity

Answer 11

• Paranasal sinuses in neighbouring bones
• Embedded portion of upper cheek teeth occupy an amount of space (particularly in horses)
• Turbinate bones
• Mucosal covering of the turbinate bones

Question 12

what are conchae (aka turbinates)

Answer 12

folding of inner wall that compartmentalize the nasal cavity

Question 13

what are meatuses

Answer 13

Nasal cavity compartments are called meatuses

Question 14

what is the most caudal part of nasal conchae

Answer 14

ethmoid turbinates

Question 15

what does increase in complexity mean in the caudal nasal conchae

Answer 15

increase in sense of smell